Damper-regulator.



W. ROBERTS & vD. H. HOLLOWAY. DAMPER REGULATOR.

APPLICATION FILED SEPT. 1l, 1907.

904,894. Patented Nov. 24, 1908.

UNTTED STATES PATENT OFFICE.

WILLIAM ROBERTS AND DELLFORD H. HOLLOWAY, OF WATERFOR'D, NEW YORK, ASSIGNORS OF ONE-THIRD TO CHARLES W. SCOVILLE, OF COHOES, NEW YOP K.

DAMPER-REGULATOR.

Specification of Letters Patent.

Patented nov. 24, 190s.`

Application filed September` 11, 1907. Serial No. 392,268.

To all whom fit may concern:

Be it known that we, lVJLLnmi loi'rn'rs, a citizen of the United States, residing at Waterford, in the county of baratoga and State ot' New York, and DnLLrono Il. Ilon- Lowin', a citizen of the United States, re siding at lVaterford, in the county of Saratoga and State of N ew York, have invent; l certain new and useful Improvements in Damper-Regillators, of which the following isa specification.

This invention relates to damper regulators, and has for an object to provide improved mechanism for opening a damper upon the fall of steam pressure to a certain predetermined point, and t'or closing the damper upon the rise or' the steam pressure to another predetermined point. By this improvement electrical contacts may be so individually adjusted that the damper will be opened and closed by the :tall and rise of the steam of a certain predetermined number of pounds, and then these adjusted electrical contacts may be so adjusted that the damper will be closed at the rise of the steam to a certain pressure, the limit of fall of pressure for opening the damper having been previously fixed by the individual adjustment of the contacts.

1f the engineer desires to employ steam sometimes at onepressure and sometimes at another but to maintain a substantially constant pressure; that is if he only desires to have a fluctuation say of two pounds, but sometimes desires to have twenty pounds of steam and sometimes desires to have one hundred pounds of steam, the electrical contacts will be so adjusted that a Contact carried by the pressure gage, a.; for instance a Bourdon tube, will make contact with one ot these upon a rise ot' two pounds pressure over the pressure required to make the contact with the other, and then by bodily adjusting these contacts which have been set, they can be placed in a position where they will control the damper upon these predetermined fluctuations` which take place about the predetermined desired pressure. The engineer might desire to run his engine with one hundred pounds of steam at the boiler, and want to keep it just at one hundred pounds. The electrical contacts would then be so adjusted that the damper would be closed when the pressure got one-half pound above the one hundred pounds and Will be opened when the pressure falls half a `pound below one hundred. And then when the lires are banken and the factory is shut up for. the night or a holiday, he may desire to have the steam at the boiler at twenty pounds for heating purposes, and without changing the amplitude of movement of the contact carried by the pressure gage, he will merely adjust the contacts bodily to get his twenty pounds pressure and have the samex i damper act1on upon the same rise and fallas in the other instance.

In the drawings accompanying and forming a part of this specification, Figure 1 shows a practicable embodiment of a form oi' our invention applied to a boiler. Fig. 2 is an enlarged view of the gage and Contact portions of the invention showing the front portion of the casing cut-H on a vertical plane. Fig. 3 is an edge view of the contact devices. This view is enlarged more than is Fig. 2. Fig. 4 is a detail upon the same scale as is Fig. 3 showing certain parts which will be described in detail in the proper place; and Fig. 5 is a vertical section through the contacts ot' the motor.

In Fig. 1, the boiler is designated in a general way by T and provided with a dome 8 and a chimney l'lue 9, which chimney flue is provided with a damper, shown in dotted lines at 10, to which damper is attached a lever 11 provided witha weight 12. The lever l1 is connected to a rotary arm 13 of a motor 14 by a suitable connection 15. This motor 14 is oi' a type which is now upon the market and is frequently used. lts construction is such that the arm 13 will, upon the closing of an electrical circuit, be given a half revolution and will be stopped, and upon the closing of another electrical circuit, will be permitted to make vanother half rotation. Since it is of the well known type, and since other motors for performing the same work could be employed in this con` nection, we will not enter into further detail concerning its construction and actuation, except to say that in Fig. l the damper is shown in an open position and the arm 13 in its upper position, where it will be automatically stopped until the circuit is closed for closin the damper when it will be turned to its lower position and there held until the circuit is closed for opening the damper.

An electrical battery is illustrated in a conventional Way at 16; and a vWire 17 leads from the battery to anelectro-magnet 18 for controlling the motor 14, a Wire 19 grounds the magnet on the frame 2O of the motor, Wires 21 and 22 are carried to insulated contacts 210 and 220 on the motor frame and the circuit to the frame is completed by a brush 132 carried by a Wheel 131 fast on the shaft 130 of the arm 13. A wire 23 grounds the battery 16 on the regulator rame plate 24.

The "regulator is shown as having a Icarriage 25 carried by an arm 26 pivoted at 27 to the frame plate 24, an arm 28is pivotcd to the carriage at 29, this arm constitutes a pointer for cooperation with a scale 30. The arm 28 is also pivoted to the plate 24 by means of a screw 31, passing through a slot 32 in the carriage 25.

The movement of the carriage, its oscillation in the present instance about the axis 2T, is effected by means of a set screw 33 having one end stepped in a bearingr carried byan arm 35 Jfrom the plate 2-1. This set or carriage-adjusting screw passes through a nut 36 mounted on the carriage. The movement of the end of the pointer adjacent the scale will' be relatively long, compared with the movement of the carriage on account of the leverage.

The carriage has upon it two posts 37 and 38 which are insulated from it and to which are respectively connected, by binding screws 39 and 40, the wires 21. and 22. These posts carry adjustable electrical contacts 4l and 42 respectively, these contacts are shown in the form of screws, with enlarged shanks 43-44 carrying scales f5-46 cooperative with index pointers #V-A8 carriedby the carriage.

rlhe boiler dome 8 is shown connected by a pipe 50 with the movable member of the regulator, in the present showing' a Bourdon tube 51, which has fastened to its trce end an electrical contact o2 which, upon risc of pressure will engage thc contact 'il and close the circuit con'iprising the battery lo, wire 23, plate 2st, Bourdon tube 5l, contact contact 11, post ST, Wire 2t. contact 210, brush 1.32 and trame 2t) of motor, Wire 19, magnet 1S, Wire 1T to battery. The closing of this circuit will cause the motor arm l to move down and close the damper, and upon the fall or reduction ot' pressure, the Bourdon tube will return toward its normal position and will brine' the contact 52 into engagement with the contact #t2 and will close the circuit ot Wire 22 and actuate the motor to `raise the arm 13 to the position seen in. Fig. 1 and which Will cause the damperto open. justed to the proper position, so that the Contact 52 will engage it when the boiler:

The contact 42 will be ad p pressure,as indicated at the gage 49 for instance, corresponds to the reading of the scale 30 and pointer 28. The Contact 42 may then be locked in its adjusted position by a set nut 53, when it is now desired that the damper be opened when the pressure falls below a certain number of pounds, the carriage 25 will be moved until the pointer indicates the number on the scale 30, fifty for instance. The damper will be kept open until, not only has the contact 52 been moved tive ot adjustments tor the damper opening pressure.

Having thus described our invention, We claim:

The. combination with a steam boiler and a furnace for heatingr the same, said furnace boincr provided with a smoke stack and damper, of a Bourdon tube open to the boiler and responsive to rise and fall ot boiler pressure, an electric contact carried by the free end of tbe Bourdon tube, an electrically' controlled damper operating device constructed and ada ptcd, upon the closing of an electric circuit, for moving to open the damper and to remain in the damper .openiurer position until actuated to close the damper. and, upon the closing ot'l an electrical circuit, for moving to close the damper and remain in the damper closing position until moved to open the damper andV eleci trical connections between said damper operating" device and the tube contact, a carriage adjustable alone` a path parallel with the path of movement of the tube contact, an adjustable electrical contact upon said carriage for the engagement of the tube contact upon the movement of the tube incident to. rise in boiler pressure and means for electrically connecting this adjustable contact with the damper operating device tor etfect ino* the closingr ot' the damper, andan adjustable electrical contact upouthe/e'arriage for the engagement ot thetube Contact u on the movement. ot' the tube incident to tal in boiler pressure and means for electrically connecting this adjustable contact with the damper.operating device for effecting the opening ot' the damper.

Dlililil( )RD il, HOLLOVLYY.

lV it misses ViLLrmi N. 'ounws, EUGENE VANDENUIIRGH, 

